HomeMy WebLinkAbout08/07/1990, C-9 - WASTEWATER MANAGEMENT PLAN IMPLEMENTATION, APPROVAL OF PLANS AND SPECIFICATIONS FOR UNIT 3 WASTEWAT I.
MEETING DATE:
,� ►�H�Ioillllilllli� lllllli city of San lues OBISPO Aucrust 7 1990
COUNCIL AGENDA REPORT ITEM NUMBER .
FROM: William T. Hetland U.:15� Prepared By: John E. Mos
Utilities Director Wastewater Division Manage
SUBJECT:
Wastewater Management Plan Implementation, Approval of Plans and
Specifications for Unit 3 Wastewater Treatment Improvements and
Phase 1 Collection System Improvements.
CAO RECOMMENDATION:
By motion, 1) approve plans and specifications for Unit 3
Wastewater Treatment Plant Improvements and Phase 1 Collection
System Improvements and authorize solicitation of bids.
DISCUSSION:
Background:
On October 28, 1986, the City retained Brown and Caldwell
Engineers to prepare the Wastewater Management Plan (WWMP) . The
purpose of the plan was to identify needed improvements to the.
City's wastewater treatment and collection facilities to meet all
discharge requirements and treat expected future flows to the
year 2015.
Implementation of the WWMP to date has included activities i
related to planning, research, design and funding. The City has
been working closely with the State Division of Loans and Grants
(SDLG) in order to obtain low interest loan funding for the
needed projects. On May 17, 1990 the State Water Resources
Control Board approved loan funding of the City's projects in the
amount of $35 million.
Plans and specifications for Unit 3 Wastewater Treatment Plant
Improvements and Phase 1 Collection System Improvements projects
were completed in May 1990 and submitted to the State Division of
Loans and Grants for review and approval. The SDLG has
subsequently completed their review of the plans and
specifications and staff is now ready to advertise these two
projects for bids.
Unit 3 Wastewater Treatment Plant Improvements project consists
of those modifications and additions to the City's treatment
facility necessary to meet the effluent requirements identified
in the City's National Pollutant Discharge Elimination System
(NPDES) permit. This includes processes for influent screening,
aerated grit removal, ammonia removal and BOD and suspended
solids removal.
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COUNCIL AGENDA REPORT
Plans and Specs Approval
Page 2
Phase 1 Collection System Improvements consist of approximately
3.2 miles of parallel relief and replacement sewers. These
sewers are being installed to relieve the problem of surcharging
of the collection system and subsequent spills resulting from
high Infiltration/Inflow (I/I) during storm events. The new
sewers will convey the high flows to the City's wastewater
treatment plant for proper treatment and disposal.
Consequences of Not Taking the Recommended Action:
Staff has negotiated with the State Regional Water Quality
Control Board (SRWQCB) , the final terms of a Consent. Decree. The
Consent Decree is a court documented agreement between the City
and the State for achieving compliance with the discharge
requirements in the City's NPDES .permit. The Consent Decree
includes a schedule of key activities or milestones necessary -to
achieve full compliance. Under the Consent Decree the. City is
required approve plans and specifications for Unit 3 by August _
28, 1990 and to advertise these projects no later than October
10, 1990. Failure to meet the dates specified in the compliance _
schedule of the Consent Decree will result in fines from the
State. It is essential to proceed with each step in the process.
in a timely manner in order to stay ahead of the compliance dates
as much as possible.
Conclusion:
In order to obtain full compliance with the discharge
requirements in the City's NPDES permit and to meet the
compliance schedule in the Consent Decree the City must proceed
with each step of the improvements projects in a timely manner.
Authorizing staff to advertise for bids is the next step in
process of achieving full compliance and is therefore recommended
at this time.
FISCAL IMPACT:
The City is seeking and has obtained concept approval for State
low interest loan funding of the needed improvements. Based on
the cost projections and a 4 percent interest rate loan from the
State, Council, on June 12, 1990, adopted Resolution No. 6824
approving rate increases of $2 .00 per month each year for the
next 3 years for a single family residence and a financing
plan/revenue program sufficient to cover the debt service expense
of the projects. Funding for these projects has been approved
and is identified in the 1989-91 Financial Plan and Approved
1989-90 Budget, Page E-17.
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NUMMO COUNCIL AGENDA REPORT
Plans and Specs Approval
Page 3
In the review of the plans and specifications the State has
identified certain elements of the construction which are not
eligible for loan funding. Those items found ineligible relate
primarily to reserve capacity. The State will fund up to 12
years capacity from the date of project initiation. An example
of this is; The State will not fund the difference in cost of a
54 inch versus a 48 inch influent line as the 54 in line is
designed for year 2015 flows and only a 48 inch line is needed to
handle the flows in the next 12 years. This difference in cost
is minor in comparison to the cost of reconstruction of the line
at a later date to accommodate the 2015 flows. Those items found
ineligible for loan funding and their estimated cost are as
follows:
Components found ineligible for funding:
UNIT 3 IMPROVEMENTS
Additional costs of providing a 54 inch
diameter influent sewer in lieu of a 48
inch diameter sewer. . . . . . . . . . . . . . . . . . . . . . . . .$17, 000
Additional costs of providing 2 influent
pumps at 22 mgd capacity in lieu of 2
pumps at 12 mgd. . . . . . . . . . . . . . . . . . . . . . . . . . . . .$80,000
Additional costs of providing new pavement
around the existing digesters. . . . . . . . . . . . . . .$12,000
Additional costs of providing landscaping
around the existing structures. . . . . . . . . . . . . .S10.000
TOTAL INELIGIBLE $1191000
PHASE 1 COLLECTION SYSTEM IMPROVEMENTS-
Bid Item No. 25 - Comply with Corps and
Fish and Game Permits. . . . . . . . . . . . . . . . . . . . . . .$10,000
Bid Item No. 26 - Comply with Caltrans
Encroachment Permit. . . . . . . . . . . . . . .. . . . . . . . . .$15,000
Additive Alternate No.1 - Televise
Existing Service Laterals. . . . . . . . . . . . . . . ... . ..899.840
TOTAL INELIGIBLE $124,840
The total engineer's estimate for each project are identified
below. The number in parentheses is the total estimated amount
found ineligible for loan funding which will have to be funded
through working capital balances or other debt financing.
�►�� ► IllllillP��"°IAl city of San tins OBISpo
COUNCIL AGENDA REPORT
Plans and Specs Approval
Page 4
Total Engineer's Estimate: Total Cost (Total Ineligible)
UNIT 3 IMPROVEMENTS- $15,245,005 ($119,000)
** PHASE 1 COLLECTION
SYSTEM IMPROVEMENTS - $ 7,152,577 ($124,840)
* Includes 3% contingency
** Includes 20i contingency
RECOMMENDATION:
By motion, approve plans and specifications for Unit 3 Wastewater
Treatment Plant Improvements and Phase 1 Collection System
Improvements and authorize solicitation of bids.
Attachments:
Plans and Specifications are available in the COUNCIL Office
for review.